| Patents for G01R 21 - Arrangements for measuring electric power or power factor (6,609) |
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| 05/27/2009 | CN201247277Y Converting device for measuring current, voltage and power parameter |
| 05/27/2009 | CN101441593A Power measuring device |
| 05/27/2009 | CN101441240A Intelligent state monitoring method of medium-pressure switch apparatus |
| 05/27/2009 | CN100492026C Electric energy computation circuit removing DC and circuit removing DC |
| 05/27/2009 | CA2644395A1 Electricity meter capable of minimizing the risk of data destruction from lightning or surge |
| 05/26/2009 | US7539581 System and method for on-line monitoring and billing of power consumption |
| 05/22/2009 | WO2009052121A3 Electrical energy usage monitoring system |
| 05/20/2009 | CN100489543C Electric power detecting circuit possessing automatic feedback and overload protection function |
| 05/14/2009 | WO2009061955A1 Approach for controlling electrical power |
| 05/14/2009 | US20090125255 Methods and apparatus for measuring voltage and voltage phase angle on bpl line |
| 05/14/2009 | US20090125157 Parameterization monitoring for analog signal modules |
| 05/13/2009 | CN201237630Y High-tension power consumption apparatus using water as load |
| 05/07/2009 | WO2009058880A2 Electrical efficiency measurement for data centers |
| 05/07/2009 | WO2008155288A3 Resource consumption control apparatus and methods |
| 05/07/2009 | WO2007041693A3 System and method for array and string level monitoring of a grid-connected photovoltaic power system |
| 05/07/2009 | US20090119039 Approach for Controlling Electrical Power |
| 05/07/2009 | US20090119038 Battery Data Logger And Display |
| 05/07/2009 | US20090119037 System and methods for dynamic power estimation for a digital circuit |
| 05/07/2009 | US20090119036 Compressor sensor module |
| 05/07/2009 | CA2703686A1 Electrical efficiency measurement for data centers |
| 05/06/2009 | CN101425700A Remote power control system and power supply tap |
| 05/06/2009 | CN101424713A Three-phase four-wire high voltage energy measuring method and device |
| 05/06/2009 | CN101424701A Computation method for making AC load |
| 05/06/2009 | CN100485398C Three-phase electric energy metering head |
| 05/05/2009 | US7528595 Method for detecting and correcting wiring errors in power monitoring applications |
| 04/30/2009 | WO2007108834A3 System and methods for a self-healing grid using demand side management techniques and energy storage |
| 04/30/2009 | US20090112494 System and Method for Providing Universal Additional Functionality for Power Meters |
| 04/30/2009 | US20090108832 High frequency power detector circuit and radio communication device |
| 04/30/2009 | DE102007046921A1 Measuring arrangement for use with three-phase or four-conductor network, has resistance network which forms neutral point and sum of measuring voltages is compared with testing voltage adjacent to neutral point |
| 04/29/2009 | CN100483910C Power-supply supplyer with load-power using-state displaying function |
| 04/28/2009 | US7526393 Virtual branch load management |
| 04/28/2009 | US7526392 Power line parameter analysis method and system |
| 04/28/2009 | CA2288875C Programmable monitoring device for electric consumption |
| 04/23/2009 | WO2009052361A2 Electrical power metering device and method of operation thereof |
| 04/23/2009 | US20090105972 Method for the determination of work performance |
| 04/23/2009 | CA2702440A1 Electrical power metering device and method of operation thereof |
| 04/22/2009 | EP2049305A2 Abrasive compacts |
| 04/22/2009 | CN101413971A Electrical energy meter and method for amplifying signal used therein |
| 04/21/2009 | US7523075 Startup cost model using time counter |
| 04/16/2009 | WO2009049221A1 A method for predicting arc flash energy and ppe category within a real-time monitoring system |
| 04/16/2009 | US20090099700 Method and device for measuring and controlling the amount of flow/volume of liquid pumped/transferred by an electro-pump |
| 04/16/2009 | CA2700891A1 A method for predicting arc flash energy and ppe category within a real-time monitoring system |
| 04/15/2009 | EP2047285A2 System and method for locating and analyzing arcing phenomena |
| 04/15/2009 | EP1692532B1 Method for functional testing of a lamp circuit |
| 04/15/2009 | CN101410717A Device and method for measuring electrical power |
| 04/14/2009 | US7519484 Power supply monitor |
| 04/09/2009 | WO2007137205A3 System and method for communicating power system information through a radio frequency device |
| 04/08/2009 | CN101405675A Method and apparatus for changing power class for a powered device |
| 04/07/2009 | US7516026 Automated utility meter reading system with variable bandwidth receiver |
| 04/02/2009 | WO2009042414A2 Virtual branch load management |
| 04/02/2009 | WO2008069867A3 Square cell having wide dynamic range and power detector implementing same |
| 04/02/2009 | US20090088991 System and method for monitoring and managing energy performance |
| 04/01/2009 | EP1275188B1 Method and device for monitoring enablement of an electrical apparatus connected to a power grid |
| 04/01/2009 | CN101398454A Solar assembly test method and device thereof |
| 04/01/2009 | CN100473996C Apparatus for detecting linear index of power amplifier |
| 03/31/2009 | US7511471 Magnetic bridge electric power sensor |
| 03/26/2009 | WO2009037163A2 Method and apparatus for monitoring power transmission |
| 03/26/2009 | US20090082980 Virtual branch load management |
| 03/26/2009 | US20090079417 Inductively powered power bus apparatus |
| 03/26/2009 | CA2699586A1 Method and apparatus for monitoring power transmission |
| 03/25/2009 | EP2040084A1 Inductively powered power bus apparatus |
| 03/25/2009 | CN100472216C Microelectromechanical microwave powersensor with two balanced thermopiles and its prepn process |
| 03/24/2009 | US7509190 Method for administering an intermittent uncontrollable electric power generating facility |
| 03/24/2009 | US7508224 Method for measuring stability margin at a node of a polyphase power grid |
| 03/19/2009 | WO2009033246A2 Method and device for measuring and monitoring |
| 03/19/2009 | US20090076749 Electrical power system modeling, design, analysis, and reporting via a client-server application framework |
| 03/19/2009 | US20090072813 Intelligent Electronic Device Having Circuitry for Reducing the Burden on Current Transformers |
| 03/18/2009 | CN201210176Y Intelligent load identification module |
| 03/18/2009 | CN101387679A Method for weighting dynamic voltage stability margin index |
| 03/18/2009 | CN101387663A Ultra low power consumption full-decompression measuring set and measurement method |
| 03/18/2009 | CN101387662A Watthour meter of three phase electronic electric energy meter and measurement method |
| 03/18/2009 | CN101387661A Single-phase electric energy meter capable of avoiding fraudulent use of electricity and measuring calculation method capable of avoiding fraudulent use of electricity |
| 03/17/2009 | US7505734 System and method for communicating broadcast messages in a mesh network |
| 03/17/2009 | US7504819 Dynamic line rating system with real-time tracking of conductor creep to establish the maximum allowable conductor loading as limited by clearance |
| 03/12/2009 | WO2008112181A3 System and method for graphically displaying energy consumption and savings |
| 03/10/2009 | US7502698 Power consumption measuring device and power control system |
| 03/10/2009 | US7502696 System and method for detecting power system conditions |
| 03/05/2009 | WO2009028763A1 Apparatus for measuring distortion power quality index and method of operating the apparatus |
| 03/05/2009 | DE102007041793A1 Energy converter's e.g. single-phase static inverter, loss determining method for e.g. charging of battery, involves dividing losses in portion for transmission of active power and portion for supply of reactive power |
| 03/05/2009 | DE102007041247A1 Vorrichtung und System zur signaltechnischen Verarbeitung einer Spannung Apparatus and system for signal processing technology to a voltage |
| 03/05/2009 | DE102007040399A1 Vorrichtung zur galvanisch getrennten Messung der elektrischen Leistungsaufnahme eines Zweipols Apparatus for electrically isolated measurement of electrical power consumption of a dipole |
| 03/04/2009 | EP1834366B1 Battery powered device for an power meter and the power meter |
| 03/02/2009 | WO2009111364A1 Method of energy procurement and system for employing |
| 03/02/2009 | CA2753938A1 Method of energy procurement and system for employing |
| 02/26/2009 | US20090051461 Output power detecting system with a directional coupler |
| 02/25/2009 | CN201199263Y Test device for load-matching monitoring instrument |
| 02/19/2009 | US20090048792 Rf power delivery diagnostic system |
| 02/19/2009 | US20090045797 Measuring apparatus for power loss of magnetic device |
| 02/19/2009 | DE102008036404A1 Einrichtung zum Ermitteln und Ausgeben einer elektrischen Größe Means for detecting and outputting an electrical quantity |
| 02/19/2009 | DE102007037058A1 Current transformer module for energy and power measuring device, has housing and wire, which is linearly guided from free end through entry point and from another free end through exit point |
| 02/18/2009 | EP2026299A1 Cognitive electric power meter |
| 02/18/2009 | CN201196663Y Double-metal thermocouple |
| 02/18/2009 | CN101368986A Broad band radio frequency power detection apparatus |
| 02/18/2009 | CN101368985A Cognitive electric power meter |
| 02/18/2009 | CN100462725C Electric power meter |
| 02/17/2009 | US7493176 Low-voltage module |
| 02/17/2009 | US7493052 Wide dynamic range sensor signal processing method & circuitry for analog and digital information signals |
| 02/17/2009 | CA2491399C Electrical-energy meter |
| 02/12/2009 | US20090043520 User Interface and User Control in a Power Aggregation System for Distributed Electric Resources |
| 02/12/2009 | US20090043519 Electric Resource Power Meter in a Power Aggregation System for Distributed Electric Resources |